Correctness of Code

This week we talked about the correctness of code. I thought that this was interesting in the sense that we are subconsciously using these algorithms to check our of code. In a sense, we are just training our mind to be like a debugger.
I also thought that the assignment was fair. Most of the questions are straightforward (except the ternary tree question). The second question was a challenge as well because I don't feel like I've grasp time complexity well.